I've been diagnosed with DID.
I was originally diagnosed about a decade ago. I spent the next 10 years fleeing from the diagnosis, denying it adamantly, and mostly ignoring it as a possibility.

Earlier this year, I finally sought out a second opinion from an expert in the field, and he confirmed the diagnosis.

I found him very helpful. He explained that most cases of DID do not present the way a lot of people "expect" them to because of media, etc. Most are highly covert - they won't just show up and say "I'm not Jack, I'm Will." Most experience "micro-amnesias," which he describes as not being able to recall what was just said, rather than massive present-day amnesia.

I have actually come to acknowledge that I have more present-day amnesia than I originally thought. Again, and this was the most important thing the psychiatrist really taught me, DID is allll about denial of one's own experience. Even now, I lapse into long periods of not believing any of it. It has been helpful for my therapist & I to associate that with a specific part.

Honestly, the diagnosis was super important to me for a time, but I'm growing to be able to accept the ambiguity....and that it's not the diagnosis, but whatever my individual experience is that matters. That I do not need to fit any sort of definition to be valid.